I know the feeling. I've experienced the same thing. One time you go and there are all kinds of cheap doors. The next time, exact same types of door are all $5. It's like they're pricing items with the help of a magic 8 ball...it gives them a different answer every time... I dunno :dontknow:
I guess it's all the luck of the draw. But either way, they're sure not $75 each.